Difference between revisions of "Monotreme"
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In addition to their unusual physical conformations, monotremes are remarkable for being the only [[mammal]]s to lay [[egg]]s, and to have [[poison]] glands (spurs on the back legs of the male platypus); these were an unpleasant surprise for several early zoologists. A feature is the absence of well-developed [[mammary glands]], the young platypi and echidnae being nourished by nutritious emissions from their mothers unmodified [[sweat gland]]s. | In addition to their unusual physical conformations, monotremes are remarkable for being the only [[mammal]]s to lay [[egg]]s, and to have [[poison]] glands (spurs on the back legs of the male platypus); these were an unpleasant surprise for several early zoologists. A feature is the absence of well-developed [[mammary glands]], the young platypi and echidnae being nourished by nutritious emissions from their mothers unmodified [[sweat gland]]s. | ||
| − | [[Category: | + | [[Category:Monotreme]] |
Revision as of 05:44, December 22, 2012
Monotremes are a small group of Australasian mammals, consisting of the duck-billed platypus and the several echidnas.
In addition to their unusual physical conformations, monotremes are remarkable for being the only mammals to lay eggs, and to have poison glands (spurs on the back legs of the male platypus); these were an unpleasant surprise for several early zoologists. A feature is the absence of well-developed mammary glands, the young platypi and echidnae being nourished by nutritious emissions from their mothers unmodified sweat glands.